SR200 Health Monitoring Smart Ring Multifunction Waterproof Finger Ring - 22mm/Black •Comfortable and lightweight wearing experience sets it apart from other smart wearable products •It can monitor health situation,such as heart rate,blood oxygen,blood pressure,etc •Combining fashion simplicity with elegance,both inside and outside,it is the pinnacle of both aesthetics and hardware strength •The intelligent ring is equipped with the most efficient hardware to provide accurate information monitoring data •It's lightweight and mini size,convenient to put into your pocket for storage Specifications: •Style: 17 (inner diameter and circumference 53.4MM); 20 (inner diameter and circumference 62.8MM); 22 (inner diameter and circumference 69MM) •System requirements: android5.0+/ios10.0+ •Main control chip: FR8016HA •Bracelet memory: 512KB •Bluetooth version: 5.0 •Heart rate sensor: HX3605 •Temperature sensor: NOVOSENSE NST112c •Battery capacity: 28mAh •Working standby: about 3~5 days •Charging method: wireless charging (including charging compartment) •Waterproof grade: IP68 •Gravity sensor: MEMS msa310 •Bluetooth distance: 3~5 meters •APP: Google: JSRings,iSO: JSRing •APP languages: English (default),Arabic,Czech,Danish,German,Spanish,Farsi,French,Italian,Japanese,Dutch,Portuguese,Romanian,Russian,Turkish,Simplified Chinese •Heart rate measurement: support •Blood oxygen measurement: support •Blood pressure measurement (algorithm): support •Multidimensional sleep monitoring: support •Pedometer: support •Calories: support •Temperature measurement (skin temperature measurement): support Package included: •1 x Smart Ring •1 x Charging Dock Station •1 x Charging Cable •1 x English User Manual